An investigation of a power factor correction circuit without use of wound devices

Abstract

Wound devices, such as the transformer or the choke coil, used in an electronic ballast generate large electrical loss and have large volume. This causes the interference in miniaturization of the electronic ballast. We investigated a power factor correction circuit which uses no wound device. The circuit configuration and its principle of operation are shown. Power factor shows 0.95 and total harmonic distortion 13.0% on the actual equipment.